Mold for rubber tires, &amp;c.



'No..aa4.eoa. PATBNTBD 00T. so, 19o@ v W, 'DUNBAIL MOLD FOR RUBBERTIRES, dw.

APPLICATION 'FILED 11.411.30.- xpos.

A f v FIG ' wlrNEssEs:

f UNITED STATES iTENT oFFroE;

WI'LMER DUVNBA'R,

or AKRON, oHio.

MoLDFon RUBBER TIRES. ao. f

Specification of Letters Patent. application med Much so, 1905. semi N6.252x824.

Patented lOct. 30, 1906.

To @ZZ whom it wila/y cbnccrn:

Be it known that I, WILMER DUNBAR, a'

citizen of the United States, residing at Akron, 1n the county of Summitand State of manufacture of rubber tires. moldfconsists of two box-likeparts or mernx5 .Ohofhave invented or discovered certain .new and usefulImprovements lniMoldsx for Rubber Tires, &c., of which improvements thefollowing is a s eciiication.A The invention escribed hereinrelates toto certain improvements in vulcanizing molds for the manufacture ofrubber articles, the improvements being especially applicable'to bershaving assages for the flow of a suitable heating iuid). `In theadjacent facesci the mold-sections are formed matrices for the receptionofthe article to be treated. Hence it is'necessary to have molds for thedifferent articles to be manufactured. The molds for tires arenecessarily quite long, and therefore expensive, and, although severalmatrices are formed `in each. mold, if a new shape or style of tire isrequired an entire new mold must be provided.

The object of the present. invention is to providethe adjacent faces ofthe mold-boxes with removableand interchan cable sections in which thematrices for Vt e articles are formved. I I e The invention ishereinafter more fully described and claimed.

In the 'accompanying drawings, forming a part of' this specification,Figure 1 is a plan view of a por-tion of one ofthe mold-sections, theupper portion being broken away; and Fig., 2 is a sectional elevation.showing the mold-sections arranged in operative relation.

In the practice of my invention each moldsection consists of a bodyportion 1, having passages 2 therethrough for the flow of a heatingfluid, as steam. 'The inner or adjacent of theseqbody portions arerecessed for the re- A vulcanizingvwalls of the outer sections. sectionsis provided with a rib on one side and i.ception of removable ysections3, in which are formed the matrices. The outer walls of the -recessesfinthe body portions are constructed, as b undercutting, to enga e the sidewalls of t eouter sections, while t e in.-

ner sections are constructed to engage and interlock with adjacentsections in each side.' It is preferred to so construct the sectlonsthat an one ormore can be removedvand an equa ,number substituted, oneof. the secfl tions operating as a key to lock the other sections inosition.

In mo ds for the'manufacture of tires the' recesses extend alon theadjacent walls ofA the bodyportions cut for engagement with thecomplementary Each of the inner A vulcanizing-mold having in'combinationbody portions having recesses -in their; inner or adjacent faces and aseries of removs' able sections having. matrices, theintermediate.sectionsbeing constructed to intelerlock with adjacentsections and the sections at the ends of the'series withfthe walls ofthe re-l l,

cesses in the body portion, substantially as setforth.. l*

In testimony whereof I have hereunto set my hand.

Witnesses: i,

CHARLES BARNETT, FRED KIRCHNER.

he side walls are underlWILMER DUNBAR.- 1

